Boys go through a growth spurt during puberty. However, the rates of growth can vary a lot because boys go through puberty at different ages. On average, boys tend to grow around 3 inches per year during this period.
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Artificial selection can create organisms that are desirable to humans but dangerous to the population (other species). It can also create new mutations, perpetuate harmful mutations, or breed the new generation having a shorter life span.
A difference between the three are that arteries are larger than capillaries and veins. However, veins are larger than capillaries.
B, Social acts are based off communication. <span />
Sickness, Weakness, Muscle sprain and/or tear
